Nut-machine



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i wif/@afm AUNA UNITED STATES PATENT OFFICE.

ROBERT GRIFFITHS, OF PHILADELPHIA, PENNSYLVANIA.

NUT-MACHINE.

Specification of Letters Patent No.

To all whom it may concern: y

Be it known that I, ROBERT GRIFFITHS, of the city of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Nut-Machines; and I do hereby declare that the following is a full,clear, and eXact description of the same, reference being had to theaccompanying drawing and to the letters of reference marked thereon.

My invention relates to improvements upon a machine for making nuts, forwhich a patent was granted to me on the thirtieth day of October A. D.1855, and consists in so arranging the cutters and punches of saidmachin-e that they can be removed and replaced with facility, also inthe peculiar construction of a stripper plate.

On reference to the drawing which forms a part of this specification,Figure 1, is a ground plan of my improved nut machine, Fig. 2, asectional elevation on the line 1 2, Fig. 1, Fig. 3, a transversesection on the line 34L Fig. 2, Figs. 4 and 5 detached views, showingt-he stripper and presser.

The same letters of reference allude to similar parts throughout theseveral views.

A is the base plate of the machine, B and VB the two standards in whichturn the shafts C, D,'E and E. The shaft O is driven by a belt orsuitable gearing in the direction of the arrow Fig. 2, and on this shaftis a cog wheel F which gearing into the wheel G on the shaft E, into thewheel I-I on the shaft E, and into the wheel I on the shaft D causes therespective shafts to turn in the direction of their arrows, all theshaft-s turning at the same speed.

On the shaft O are two cams c, c, which operate the lower table J, thelatter being arranged to slide in lugs b, b, cast or otherwise securedto the inside of the opposite frames B and B. On the shaft D are alsocams cl, (Z, which as the shaft revolves, depress the upper tables Kwhich slides in lugs 7c, 7c, the upward movement of the table beingaccomplished by means of suitable springs. Both upper and lower slidingtables are furnished with dovetailed grooves for receiving dies m and athe size of which are varied according to the form of nuts to bemanufactured.

Between the upper cro-ss bars a, e and and the permanent lug h and crossbar g below, slides the plate M and plate P with its hinged lid L andthe punching bars N, N,

16,142, dated December 2, 1856.

N, and cutting bars O, O, O. The upper plates P and M. The bar c bearsdirectly on the hinged lid, and the bar f on the punching and cuttingbars. The forward movement of the plate M is effected by the cams p, ya,on the shaft E bearing directly against the end of the plate, and thebackward movement by the same cams bearing against the yokes g, g, theends of which are fastened to the plate, the other ends sliding inorifices in the cross-head Q. The forward movement of the plate P iseffected by the cams r, 1, o n the shaft E, and the backward movement bythe cam t on the same shaft bearing against the yoke S, one end of whichis secured to the plate P the other to the crosshead Q the ends of whichslide in slots in the opposite frames B and B. It will be thus seen thatthe plate P with its punching bars N has a sliding movement, independentof that of the sliding .plate M with its cutter bars O.

On the end punching bar N is a cutter u the object of which will beapparent hereafter. R is the stripper plate, the horizontal portion ofwhich is arranged to slide between the top of the permanent bar c and aplate against which bear the punching and cutting bars, the strippingportion of the plate consists of three projections passing between thecutter bars, the projections having holes through which pass the roundportions of the punching bars. On the opposite end of the machine arealso, a series of sliding cutting bars O, O, O, and punching bars N2,N2, N3, the ends of the punching bars on one end of the machine,coinciding with the ends of the cutting bars on the opposite end of themachine and vice versa, and the punching portion of the punching barsenter ing the orifices in the cut-ting bars.

On the end punching bar N3 is a knife u similar to that above referredto in reference to the bar Y. These punching and cutting barsslidebetween the two plates S and T which move together between thecross bars f and g which are so attached to the frames B and B, as to becapable of yielding vertically to a slight extent.

Secured tothe plates S and T and coinciding with the punching bars N2,N2 and N3 are the stripping and pressing plates w, w which are dividedin the middle as seen in Fig. 3, the punching port-ion of the barspassing between the openings at the junction of the said plates. Theupper plate S is so hinged to the plate T that both move together theforward movement being effected by the cams y, y, on the shaft E bearingagainst projections on the lower plate T, and the backward movement bythe salne cams bearing against the yokes 00, x, attached to the sameplate. The punching and cutting bars on this end of the machine, are inother respects similar and similarly arranged and driven to thosealready described in reference to the other end of the machine; in thelatter however there are but two independent movements namely those ofthe cutting and punching bars while in the latter there are threeindependent movements, namely those of the cutting bars, punching bars,and pressing and stripping late. P Although I have shown the two ends ofthe machine with different descriptions of pressing and strippingplates, I wish it to be understood that both ends may be alike, andeither of the plans adopted.

Operation: Supposing the machine to be set in motion and the movableparts to be in the position shown in Fig. 2, with a bar of heated ironintroduced through an orilice in the frames, the first movement thattakes placewill be that of the table J which by the action of the camsc, C, rises until the top of the die is level with the bottom of thepunching and cutting bars, simultaneously with the rising of the tableJ, the table K by the action of the cam d descends until the heated barof iron is confined be- -tween the upper and lower dies m and n.

The opposite cutter bars now advance simultaneously, and with them theknives n n causing the heated bar to be severed into siX blanks. Thesquare blocks or blanks of heated iron are now acted upon by theopposite punching bars which also advance simultaneously perforating theblanks. The points of the punches have now entered a short distance,into the orifices of the cutting bars, and both continue to advanceuntil the shoulders on the punching bars have forced the strippersagainst the nuts, so that the latter become pressed between the ends ofthe cutter bars, and the stripper plates R. As the edges of the blanksduring the above operation were confined in one direction by the dies mand n, and in another direction by the sides of the cutter bars, it isevident that the holes in the nuts will be central, while the edges andfaces will be perfectly uniform and smooth. The opposite punching barsnow recede so that their ends are, by means of the stripper R, releasedfrom the nuts, the cutter bars now also recede, the table J descends,and the table K rises, so that the machine is again in the positionshown in Fig. 2, when a repetit-ion of the above movements takes place.The stripper R is allowed to have a slight sliding movement as beforeremarked; the object of this is in order that it may be withdrawn ashort distance with the receding punching bars, so as to allow anotherheated bar to be readily introduced, at the same times it serves on theadvance of the punching bars as a medium for squeezing up the blanks asbefore described.

The modified form of strippers and pressers shown in Figs. 2, 3 i and 5although not absolutely necessary for the due performance of themachine, possesses the advantages on account of the divisions at theorifices, and yielding bars f and g of separating should the end of thepunches be burred up; the strippers w also can be easier removed andreplaced than the strippers R.

Should both ends of the machine be furnished with the stripping andpressing plates w, w the result would be precisely the same as the onlydifference between the two arrangements is this, that the stripper Rslides on a permanent portion of the frame, while the strippers andpressers w, w, have a movement independent of the cutting and punchingbars.

It should be understood that the pieces `forced from the hot iron by theends of the punching bars into the orifices on the ends of the cuttingbars pass from thence through another orifice communicating with thefirst to the ground.

By removing the cross bars a e and f, and turning up the hinged lid Lthe whole, or any one of the punching and cuttings bars, may be removedand replaced with facility, the same may be said of the bars on theopposite end of the machine.

What I claim and desire to secure by Letters Patent is,

1. The manner substantially as herein set forth of securing the punchingand cutting bars between the sliding plates for the purpose specified.

2. The combining of the punching and cutting bars, with the strippers,the said strippers being whole or divided and operating in either of themethods specified.

ROBERT GRIFFITHS.

Vitnesses HENRY HowsoN, IVILLIAM E. WAL'roN.

